PL297383A1 - - Google Patents

Info

Publication number
PL297383A1
PL297383A1 PL29738391A PL29738391A PL297383A1 PL 297383 A1 PL297383 A1 PL 297383A1 PL 29738391 A PL29738391 A PL 29738391A PL 29738391 A PL29738391 A PL 29738391A PL 297383 A1 PL297383 A1 PL 297383A1
Authority
PL
Poland
Application number
PL29738391A
Inventor
Harold Edward Bellis
Kamlesh Kumar Bhatia
Original Assignee
Du Pont
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Du Pont filed Critical Du Pont
Publication of PL297383A1 publication Critical patent/PL297383A1/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
    • C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
PL29738391A 1990-06-28 1991-06-07 PL297383A1 (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/545,379 US5138074A (en) 1990-06-28 1990-06-28 Continuous catalyzed vapor phase dimeric cyclic ester process

Publications (1)

Publication Number Publication Date
PL297383A1 true PL297383A1 (xx) 1992-07-13

Family

ID=24175976

Family Applications (1)

Application Number Title Priority Date Filing Date
PL29738391A PL297383A1 (xx) 1990-06-28 1991-06-07

Country Status (9)

Country Link
US (1) US5138074A (xx)
EP (1) EP0536278A4 (xx)
JP (1) JPH0832701B2 (xx)
CN (1) CN1057650A (xx)
AU (1) AU8210191A (xx)
IE (1) IE912241A1 (xx)
PL (1) PL297383A1 (xx)
PT (1) PT98120A (xx)
WO (1) WO1992000292A1 (xx)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5319107A (en) * 1990-09-18 1994-06-07 Biopak Technology, Ltd. Method to produce cyclic esters
US5274127A (en) * 1990-09-18 1993-12-28 Biopak Technology, Ltd. Lactide production from dehydration of aqueous lactic acid feed
US5767222A (en) * 1988-08-08 1998-06-16 Chronopol, Inc. Degradable polydioxaneone-based materials
US5444113A (en) * 1988-08-08 1995-08-22 Ecopol, Llc End use applications of biodegradable polymers
JP2852545B2 (ja) * 1989-11-14 1999-02-03 チッソ株式会社 複数の不斉点を持つ光学活性化合物および製造法
US5332839A (en) * 1990-09-18 1994-07-26 Biopak Technology, Ltd. Catalytic production of lactide directly from lactic acid
US5326887A (en) * 1991-02-27 1994-07-05 E. I. Du Pont De Nemours And Company Process for the preparation of 1,4-dioxane-2,5-diones
US5258488A (en) * 1992-01-24 1993-11-02 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US6326458B1 (en) 1992-01-24 2001-12-04 Cargill, Inc. Continuous process for the manufacture of lactide and lactide polymers
US5247059A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for the manufacture of a purified lactide from esters of lactic acid
US6005067A (en) 1992-01-24 1999-12-21 Cargill Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5247058A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5142023A (en) * 1992-01-24 1992-08-25 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5420304A (en) * 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
US5675021A (en) * 1992-03-19 1997-10-07 Chronopol, Inc. Method to produce and purify cyclic esters
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction
ES2123668T3 (es) * 1992-10-02 1999-01-16 Cargill Inc Papel que tiene un recubrimiento de polimero de lactida estable en estado fundido y procedimiento para su fabricacion.
NZ256967A (en) 1992-10-02 1997-04-24 Cargill Inc Fabric formed from a melt-stable lactide polymer composition and uses thereof
US5338822A (en) * 1992-10-02 1994-08-16 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
US6005068A (en) 1992-10-02 1999-12-21 Cargill Incorporated Melt-stable amorphous lactide polymer film and process for manufacture thereof
AU651550B3 (en) * 1994-05-12 1994-07-21 Robert Charles Bio mechanical corrective devices
US5521278A (en) * 1994-08-18 1996-05-28 Ecological Chemical Products Integrated process for the manufacture of lactide
US5801255A (en) * 1996-08-01 1998-09-01 Shimadzu Corporation Method for producing lactide and apparatus used therefor
US6229046B1 (en) 1997-10-14 2001-05-08 Cargill, Incorported Lactic acid processing methods arrangements and products
US6475759B1 (en) * 1997-10-14 2002-11-05 Cargill, Inc. Low PH lactic acid fermentation
US6509179B1 (en) 2000-10-12 2003-01-21 Barbara I. Veldhuis-Stribos Continuous process for preparing lactic acid
US6984293B2 (en) * 2001-03-15 2006-01-10 Tate & Lyle Ingredients Azeotropic distillation of cyclic esters of hydroxy organic acids
US6982026B2 (en) * 2001-03-15 2006-01-03 Tate & Lyle Ingredients Americas, Inc. Azeotropic distillation process for producing organic acids or organic acid amides
US6926810B2 (en) * 2001-03-15 2005-08-09 A. E. Staley Manufacturing Co. Process for obtaining an organic acid from an organic acid ammonium salt, an organic acid amide, or an alkylamine organic acid complex
KR101154029B1 (ko) * 2009-05-20 2012-06-07 한국화학연구원 젖산에스테르로부터 락타이드의 직접 전환용 촉매 및 이를 이용한 락타이드의 제조방법
WO2012000921A1 (en) 2010-06-29 2012-01-05 Solvay Sa Process for the manufacture of lactide
EP2407463A1 (en) 2010-07-14 2012-01-18 Solvay SA Process for the manufacture of a cyclic diester of an apha-hydroxyacid
US20120245322A1 (en) * 2011-03-25 2012-09-27 Hyundai Motor Company Manufacturing lactide from lactic acid
KR101326521B1 (ko) * 2011-05-26 2013-11-07 현대자동차주식회사 유산으로부터 락타이드의 제조 방법
WO2013160485A1 (de) 2012-04-28 2013-10-31 Uhde Inventa-Fischer Gmbh Verfahren zur kontinuierlichen herstellung von lactid direkt aus konzentrierter milchsäure
KR101326524B1 (ko) 2012-05-08 2013-11-07 현대자동차주식회사 유산으로부터 락타이드 제조 방법
KR101376483B1 (ko) * 2012-08-20 2014-03-25 한국화학연구원 젖산으로부터 락타이드의 직접적 제조방법 및 이에 사용되는 촉매
CN107151238A (zh) * 2016-03-05 2017-09-12 李坚 甲酸盐或碳酸盐为原料合成乙交酯和乙醇酸低聚物的方法及应用
GB201621549D0 (en) * 2016-12-19 2017-02-01 Univ Leuven Kath Catalytic process
CN112469759B (zh) * 2018-10-29 2023-07-25 上海浦景化工技术股份有限公司 低固体残留物的乙交酯生产
CN112442006A (zh) * 2019-08-28 2021-03-05 上海东庚化工技术有限公司 一种连续合成l-丙交酯的方法
CN111039918A (zh) * 2019-12-24 2020-04-21 安徽丰原发酵技术工程研究有限公司 一步气相反应制备d-丙交酯的方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE261362C (xx) *
US1095205A (en) * 1913-05-15 1914-05-05 Chemische Werke Vorm Dr Heinrich Byk Manufacture of lactid.
US2668162A (en) * 1952-03-20 1954-02-02 Du Pont Preparation of high molecular weight polyhydroxyacetic ester
US4727163A (en) * 1985-07-11 1988-02-23 E. I. Du Pont De Nemours And Company Process for preparing highly pure cyclic esters
GB8623771D0 (en) * 1986-10-03 1986-11-05 Ici Plc Chemical compounds
EP0264926B1 (de) * 1986-10-24 1992-04-08 Boehringer Ingelheim Kg Verfahren zur Herstellung und Reinigung thermolabiler Verbindungen
US4835293A (en) * 1987-02-24 1989-05-30 E. I. Du Pont De Nemours And Company Atmospheric pressure process for preparing pure cyclic esters
DD261362A1 (de) * 1987-05-28 1988-10-26 Akad Wissenschaften Ddr Verfahren zur herstellung von polymerisationsfaehigen 1,4-dioxan-2,5-dionen

Also Published As

Publication number Publication date
PT98120A (pt) 1992-03-31
CN1057650A (zh) 1992-01-08
IE912241A1 (en) 1992-01-01
US5138074A (en) 1992-08-11
JPH0832701B2 (ja) 1996-03-29
JPH05507495A (ja) 1993-10-28
AU8210191A (en) 1992-01-23
EP0536278A4 (en) 1993-05-05
WO1992000292A1 (en) 1992-01-09
EP0536278A1 (en) 1993-04-14

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